Lathe-tool holder and steady-rest.



No. 830,635. A PATENTED SEPT. 11, 1906. L. 11. BAKKER. LATHE T001.HOLDER AND STEADY REST.

APPLICATION FILED JAN.23. 1905.

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/e I V Iol a UNITED STATES PATENT OFFICE.

LEWIS R. BARKER, OF PARKVILLE, MISSOURI. LATHE-TOOL HOLDER ANDSTEADY-REST.

Patented Sept. 1 1, 1906.

Application filed January 23, 1905. Serial o. 242,416.

To @ZZ whom it may concern:

Be it known that I, Lnwrs R. BARKER, a citizen of the United States,residing in Parkville, vin the county of Platte and State of Missouri,have invented a new and useful Improvement in Lathe-Tool Holders andSteady- Rests, of which the following is a specication, reference beinghad therein to the accompanying drawings, forming a part thereof.

My invention relates to improvements in lathe-tool holders andsteady-rests. p The object of my invention is to provide a mechanismadapted to be used with an ordinary engine-lathe by means of which thework may be firmly held against the cuttingtool, means being provided bywhich as the tool cuts the work away a work-supporting device may besimultaneously fed toward the work, so as to firmly support the same.

My invention provides further means by which the steady-rest may bereadily adjusted to work of different diameters.

Other novel features are hereinafter fully described and claimed.

In the accompanying'drawings, Figure l is a side elevation of thetool-holder and steadyrest. Fig. 2 is a longitudinal sectional viewtaken on the dotted line c d of Fig. 3. Fig. 3 is a top view. Fig. 4 isa horizontal sectional view taken on the dotted line g t of Fig. 2. Fig.5 is an elevation view of the nut 18. Fig. 6 is a vertical sectional`view taken on the dotted line 'i y' of Fig. 2. Fig. 7 is a verticallongitudinal sectional view of the parts employed to pivot the pivotedmember 14 to the main support. Fig. 8 is a section taken on thedottedline ef of Fig. 7.

Similar characters of reference denote similar parts.

1 denotes a support adapted to be mounted horizontally in the tool-postof an ordidary engine-lathe.

2 denotes a tool-holder slidably mounted in the end of a slot 3 providedin the support 1.

4 denotes the lathe cutting-tool, and 5 the work, such as a small rodheld in the lathechuck. (Not shown.)

6 denotes a clamping-screw mounted in the tool-holder 2 and adapted tobear upon the lathe-tool 4.

Slidably mounted in the slot 3 is a transverse nut comprising twocylindrical members 7 and 8, rigidly held together by means of twoscrews 9- and provided at their abutting ends with twooppositely-disposed semicrcular recesses 10, which are internallyscrew-threaded and adapted to fit a screwthreaded portion 11 on a rod12, disposed longitudinally and rotatively mounted in a hole extendingthrough the support 1. The forward end of the rod 12 is provided with aportion 13, threaded oppositely to the portion 11 and fitted to ascrew-threaded hole in the rear end of the tool-holder 2. A curvedmember 14, concave upon its upper side, is provided at its rear end withtwo upwardlyextending arms 15 and 16, provided with transverse holes, inwhich are rotatively mounted, respectively, the members 7 and l8. A nut18 is mounted upon the screwthreaded outer end of the member 8. Theouter end of the rod 12 is provided with a iiange 17, which bearsagainst the rear end of the support 1. A plate 19, having a central holethrough which extends the rod .12 bears against the outer side of thefiange 17 and prevents rearward movement of the rod 12, the said platebeing secured in any desirable manner to the support 1. The lower sideof the forward end of the support 1 is provided with a transversecircular recess, in which is pivotally mounted the horizontalcylindrical head 20 of a vertical screw 21, which extends through avertical hole 22, provided in the middle of the member 14. Thescrewthreaded lower end of the screw 21 has mounted rotatively thereupona nut 23, prefer'ablyof a generally spherical form and provided with ahorizontal peripheral central fiange 24, preferably polygonal in form.The upper side of the nut 23 is seated in a curved recess provided inthe lower side of the member 14. A plate 25, provided with a centralvertical hole 26, through which extends the screw 21, is secured, bymeans of screws 28, to the lower side of the member 14. The upper sideof the plate 25 is provided with a curved recess fitted to the lowerside of the nut 23. The forward end of the member 14 is provided with ahorizontal recess 27 on its inner side, in which is slidably mounted awork-supporting member 29, the forward end of which is preferablyprovided with a groove of V-shaped form adapted to embrace the work 5upon the side opposite that engaged by the lathe-tool 4. The oppositeside of the work-supporting device 29 is provided with a screw-threadedhole 30, in which is fitted one end of a screw 31, the other end ofwhich extends through the member 14 and has supported thereon upon theoutside of' said member 14 a collar 32, which prevents IOO IIO

movement toward the work of screw 31. Movement lengthwise of the screw81 in the opposite direction is prevented by means of a lange 33,provided on the screw- 31 and disposed in the recess 27.

In operating my invention the support 1 is rigidly mounted lin thetool-post of the lathe and the lathe-tool 4 inserted in the tool-holder2. The member 14 is then swung by rotating the nut 23 so as to bring theworksupporting device in the horizontal plane of the work 5. The screw31 is then rotated in a direction such that the work-supporting device29 will bear against the work 5. now the work 5 be caused to rotate byrunning the lathe in the ordinary manner and the rod 12 be rotated inthe proper direction, the tool-holder 2 will be forced forward so thatthe lathe-tool 4 will perform its work upon the material 5. At the sametime the member 14 will be moved in a direction opposite to thedirection in which the toolholder moves. The threaded portions 11 and 13of the rod 12, having threads with the the same number to the inch, willwhen the rod 12 is rotated cause the tool-holder 2 and themember 14 tomove simultaneously in opposite directions at the same rate of speed,thus always retaining the work-supporting device 29 in contact with thework 5, which is thus held firmly against and prevented from beingsprung away from the tool 4.

My invention is adapted particularly for use in turning tubes or rods ofsmall diameter.

Various modiiications of my invention may be resorted to withoutdeparting from its spirit.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, isf

1. The combination with the support provided with means for holding thelathe-tool and adapted. to be secured in the tool-post of a lathe, of amember pivoted thereto, a rod pivoted to and connecting the support withthe tool-holding member, means connected with the said rod by which thepivoted member may be swung upon its pivotal support, means connectedwith the pivoted member 'for supporting the work against the pressure ofthe lathe-tool, and means for simultaneously moving the tool-holder andpivoted member in opposite directions.

2. The combination with the support provided with means for holding thelathe-tool and adapted to be secured in the tool-post of a lathe, oi amember pivoted thereto, a rod pivoted at one end to the support andprovided at its other end with a screw-threaded portion, a nut rotatableupon said screw threaded portion oi the said rod, means by which whenthe said nut is rotated upon the rod the pivoted member is swung uponits support, means connected with the pivoted -member for supporting'the work against the pressure of the lathe-tool, and means forsimultaneously moving the tool-holder and pivoted member in oppositedirections.

3. The combination with a support adapted to be secured in the tool-postoli' a lathe, of a tool-holder movable thereon, a member pivoted to andslidable upon said support relative to the tool-holder, awork-supporting device carried by the pivoted member, adjusting meansfor swinging said pivoted member relative to the tool-holder, and meansfor simultaneously moving the pivoted member and tool-holder in oppositedirections.

4. The combination with a support adapted to be secured in the tool-postof a lathe, of a tool-holder slidably mounted thereon, a member pivotedto said support and slidable thereon, a work-supporting device carriedby the pivoted member, adjusting means for swinging the said pivotedmember relative to the tool-holder, and means for simultaneously slidingthe pivoted member and toolholder in opposite directions.

5. The combination with a support adapted to be secured in the tool-postof a lathe, of a member slidably mounted upon and pivoted to saidsupport, a tool-holder slidably mounted upon said support, awork-supporting device carried by said pivoted member, anadjusting-screw having a universal joint connecting it with the pivotedmember and having a pivotal joint connecting it with said support, andmeans for simultaneously sliding the tool-holder and pivoted member inopposite directions.

6. The combination with a support adapted to be secured in the tool-postof a lathe, of a tool-holder slidably mounted thereon, a member pivotedto and slidable upon said support, a work-supporting device carried bysaid member, a rod pivotally connected to the said support and having ascrew-threaded portion, a nut mounted on said screwthreaded portion andhaving a universal joint supporting said pivoted member, and means Jforsimultaneously moving the pivoted member and tool-holder in oppositedirections.

7. The combination with a support adapted to be secured in the tool-postof a lathe, of a tool-holder slidably mounted thereon, a member pivotedto and slidable upon said support, a work-supporting device carried bysaid member, a screw pivoted to said support, a nut mounted on the screwand having a universal joint supporting said pivoted` member, and meansf or simultaneously sliding the tool-holder and said member in oppositedirections.

8. The combination with a support adapted to be secured in the tool-postof a lathe, of a tool-holder slidably mounted thereon, a member pivotedto and slidable on the sup- IOO IOS

IIO

port, a Work-supporting deviee carried by said pivotal member, means foradjustingv said Work-supporting device toward and from the ltool-holderupon said member, a

5 screw pivotally connected to said support, a nut mounted on said screwand supporting the pivoted member so as to permit swinging thereof, andmeans for simultaneously slid-r ing the tool-holder and said member inopposite directions.

9. The combination With a sup ort provided With a longitudinal slot anadapted to be secured in the tool-post of a lathe, of a tool-holderslidable in said slot, a nut slid- 15 able in said slot, amember'pivoted to said nut'7 a Work-supporting device Carried by saidmember, adjusting means for swinging said member and which permitssliding of the tool-holder and nut, and a rod rotatively mounted in saidsupport and having oppo- 2o sitely-threaded portions engagingrespectively said nut and said tool-holder.

In testimony whereof I have signed my name to this specification inpresence of tWo subscribing witnesses.

LEWIS R. BARKER.

Witnesses: v

WALTER H. CLARK, S. F. WILSON.

